Fixes to BytesIO widget exporting
Fixes to BytesIO widget exporting

basnijholt/holoviews,vascotenner/holoviews,basnijholt/holoviews,basnijholt/holoviews,vascotenner/holoviews,ioam/holoviews,vascotenner/holoviews,ioam/holoviews,ioam/holoviews